Gumming device foe envelope machines



(No Model.) 2 Sheets-Sheet 1* B. RAU. GUMMING DEVICE FOR ENVELOPE MACHINES.

No. 425,629. Patented Apr. 15, 1890.

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E, RAU GUMMING D EVIQB FOR ENVELOPE MACHINES. No. 425,629.' Patented Apr. 15. 1890.

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UNITED STATES PATENT OFFICE.

EMANUEL RAU, OF BROOKLYN, ASSIGNOR TO THE EMANUEL RAU MANU- FACTURING COMPANY, OF NEW YORK, N. Y.

GUMMIN'G DEVICE FOR ENVELOPE-MACHINES.

SPECIFICATION forming part of Letters Patent No. 425,629, dated April 15, 1890.

Application filed December 26, 1888. Serial No. 294,718. (No model.)

To aZZ whom it may concern: provided with an eye at its upper end to con- Be it known that I, EMANUEL RAU, a citizen nect it by a pin to the rocker-arm G.

of the United-States, residing at Brooklyn, His a lug on the inner side of pitman F,

county of Kings, and State of New York, recessed to hold the upper end of rod E,

have invented and made Improvements in which carries cam-roller D. Gumming Devices for Envelope-Machines; I I are pins, which project from the inner andI hereby declare that the following is a side of pitman F, between which cam-roll full, clear, and exact description and specifirod E passes. They act as guides to red E. cation of the same, reference beinghad to the J is a rocker-shaft held under the frame- 10 accompanying drawings. table A, by lug-bearings K K.

Gumming devices of various kinds have L L are carrier-arms secured to rocker-shaft heretofore been known and used in oonnec- J by keys or otherwise, projecting upward at tion with envelope-forming machines; but I about right angles to rocker-arm G, which is am not aware that ever previous to my inalso secured to rocker-shaft J. I 5 vention thereof the devices set forth in this M is a roll supported in arms L L, the upschedule have ever been used or known. per ends of the said arms being slotted length- The object of my invention is to provide a wise. simple and effective apparatus for transfer- N N are boxes or slides situated in the slots ring gum from the gum-trough roll in an enin arms L L. Into these slides the ends of 20 velope-machine to the gumming stamps or roll M enter by bearing pins or journals. 7o pickers, and it relates to peculiar mechanism 0 O are studs or pins, which are situated for operating the gum-transferring roll and in the slots of arms LL, and are beneath the for giving it proper motions for first receivslide N and joined to them. ing gum and then transferring it to the pick- P P are other slots or recesses in arms L L,

15 ers; and it consists in certain parts or elebeneath and separated from the slots in the ments and combinations thereof, fully set upper end by blanks. These blanks are bored forth in and claimed. at the end of this schedout and countersunk to permit the studs or ule. pins O to pass through them. Nuts Q, Q are In order that persons skilled in the art may screwed to the ends of these pins 0 O to act 0 understand, construct, and use myinvention, as stops to prevent them. from rising out of I will proceed to describe it, referring to the their positions. drawings, forming a part of this specification. R R are coiled springs placed around the Figure 1 represents a side View of my dethe pins 0 0 between the lower surfaces of vice mounted in its supporting-frame. Fig. slide-bearings NN and the countersinks or 3 5 2 represents a front view of the same. Fig. recesses, through which pins 0 0 pass. This 3 represents a side view of the carrier-arm. arrangement provides elastic spring-bearings Fig. 4 represents a side view of the lower to roll M in the arms L L. portion of connecting rod or pitman, and the R R are the usual gumming stamps and cam mechanism. pickers. The mechanism for operating these 40 B is the actuating-shaft or main drivingpickers is not shown, as it is no part of my 0 shaft of the machine. present invention. These pickers are shown A is the frame of the machine, which supas in their proper position for receiving gum ports all the working parts. on their under surfaces as the roll M passes O and O are the cams fastened to the and repasses beneath them. 5 shaft 13. S is the gum-supplying roll which revolves 5 D is the cam-roll. (by mechanism not shown) in the gum-trough E is the forked rod in which the roll 1) re- T. I have shown the parts of an envelopevolves. machine which particularly relate to the de- F is the connecting rod or pitman forked vices for opcratingthegum-casing roll Mback- 50 at its lower end to straddle the shaft 13, and ward and forward. Ice

V is the groove in the cam C C, which is cut in its periphery. It passes completely around the larger cam 'O and also completely around the circular hub O. This V-shaped groove crosses its own track at the point where the distance from the center of the shaft B is the same on both cams or on cam O and hub O.

The cam-roll D in rod E traverses or runs in the cam-groove. In order to follow the groove the cam-roll must have a lateral play. This is provided for by its connection with lug H on pitman F, and the guide-pins I I be: tween which rod E moves laterally when forced to do so by the course of cam-groove V; The pitman F rests its entire weight upon cam-roll D and cam C 0' through the mediation of the lug H. The forked end of pitman F where it straddles the shaft B islong enough to prevent the revolution of the cam from-im: The

terfering with the .vertical movement. elastic or yielding bearing. of :the gummingrod M incarrier-arms L L has been previously described.

The operation of my invention isasfollows: The main driving-shaft B having been caused to revolve in the directionof the arrow, giving motion to:ihe otherparts of :the envelope machine through their necessarylconnections and mechanism, (the cam O Q being placed,

as shown, s0,that the cam-roll -D rests upon its highestpoint or point of greatest throw, and the gumming-roll M through its connections, as shown,-at its point of greatest throw away from the gum-feeding roll S and its trough T,):the cam-roll moves down the .in-\

cline of the cam-groove towardthe center of shaft B to its point ofleast throw, this being caused by the weight of the parts beneath the rocker-shaft J, which rest upon and are carried by the cam CC and its cam-roll D. Thecarrier-arms L L are actuated toward and up to thefeed-roll S. The roll S transfers to roll M a portion of the gum,while the two revolve in contact with each other. The roll M remains in such contact during. one revolution of shaft B, or while the cam-roll D trav erses that portion of cam-groove V which surrounds the circumference of the hub C and until the roll D, having crossed itsown throw or distance from the center of shaft B.

This forces up the parts which rest upon it and throws the carrier-arm, by means of its connections, back to the starting-point, or its greatest distance from the gum-trough,where it remains during two-thirds of a revolution of the shaft B, as will be seen, by the shaping of the earn 0, when it again repeats the operation, each time passing the gummingroll M beneath the under surface of the gumstamps R and leaving a portion of its gum on said stamps. It will be seen from the descriptionand the drawings that the roll M remains in contact with the roll S, while the cam-roll D traversesthe circumference of that portion of the cam marked 0. This is provided in order that time maybe given forthe roll M to receive gum from roll S. The mechanism for revolving said rolls together is not shown andisnot made a part of this application. The arms L L move ina circular arc, andthe rollM being supported on springbearings in said arms,:the ,parts areso adjusted as to pass underthestamps or pickers elastically, orso that the roll M presses the gum fromitssurface onto the stamps. This operation and device does away with the usual gum-carriage inenvelope-machines and greatly simplifies the mechanical arrangementslfor. this-portion of the envelope mechanism.

Having now fully describediny invention and the mannerin which I have appliedit to envelope-machinery, what I claim as new, and 

